What type of product are available to plug larger gaps in concrete walls, which are subject to hydrostatic pressure (e.g. wet dirt on one side)?
Specifically I have an 18" tall retaining wall type foundation filled with clay soil and always wet due to a spring. The drain area just happens to be at a seam between an older and newer foundation section, and that's right where water seeps through. The gap is large, and presumably will move over time. I have access to both sides.